neil brown Posted June 17, 2020 Report Share Posted June 17, 2020 Is it crucial for this to be done when engine is running as stated in manual I just set mines to Subaru v1-6 5 years ago and been tuned 3 times Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 18, 2020 Report Share Posted June 18, 2020 It would be highly recommended. I have found some engines have pretty significant variation in trigger offset. +/-3deg is not uncommon. So if the car our basemap come from was a "+3 deg" and your car is a "-3" then your timing could be 6 degs different than what the numbers in the ign table show. Having said that - it will depend a lot on the tuners level of competency as well. I never touch a car without first checking the trigger offset and confirming there is no timing drift or scatter through the rev range, im not sure everyone does. If the car was tuned steady state to MBT in every cell then trigger offset wouldnt matter so much - but many tuners dont and they may just assume the numbers in the ignition table are gospel. Quote Link to comment Share on other sites More sharing options...
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